/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.hive.ql.udf;

import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.ql.exec.UDF;

/**
 * A UDF for testing, which throws RuntimeException if  the length of a string.
 */
@Description(name = "test_error",
value = "_FUNC_(col) - UDF throws RuntimeException if  expression evaluates to false")
public class UDFTestErrorOnFalse extends UDF {

  public int evaluate(Boolean b) {
    if (b) {
      return 1;
    } else {
      throw new RuntimeException("UDFTestErrorOnFalse got b=false");
    }
  }
}
